CN103426487B - A kind of reactor core water level and the excessively mutual calibration method of cold margin channel - Google Patents

A kind of reactor core water level and the excessively mutual calibration method of cold margin channel Download PDF

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CN103426487B
CN103426487B CN201210163798.2A CN201210163798A CN103426487B CN 103426487 B CN103426487 B CN 103426487B CN 201210163798 A CN201210163798 A CN 201210163798A CN 103426487 B CN103426487 B CN 103426487B
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vsl
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reactor core
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CN103426487A (en
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李小芬
苟拓
何正熙
余俊辉
李白
王远兵
王华金
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Nuclear Power Institute of China
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Nuclear Power Institute of China
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Abstract

The present invention relates to a kind of reactor core water level and cross the mutual calibration method of cold margin channel.The present invention is based on the cold nargin of the minimum mistake of reactor core and reactor pressure vessel level measuring passage uncertainty and the combination of redundancy series data to check with intersecting of physics Probability Area, by obtaining A, the step of the measurement data of B series, the step that mutual school entry condition judges, the step of signal the state of validity statistics and primary Calculation, the step that theoretical consistance judges, and the step of data calculation and check, by A, B row measurement data is finally processed into unique one group of cold nargin of the minimum mistake of the most believable reactor core and pressure vessel waterlevel data, improve data reliability, simplify operator's interface quantity, avoid operator simultaneously and run into A, the situation that cannot process when B column data is inconsistent.

Description

A kind of reactor core water level and the excessively mutual calibration method of cold margin channel
Technical field
The present invention relates to a kind of reactor core water level and cross the mutual calibration method of cold margin channel, particularly relate to the reactor core water level of a kind of nuclear power plant Post Accident Monitoring System data processing field and cross the mutual calibration method of cold margin channel.
Background technology
According to literature search, " Design of Inadequate Core Cooling Monitoring System in Qinshan Phase II Extension Project " delivered in " Nuclear Power Engineering " 2008Vol.29No.1 5th ~ 9 pages is comparatively close with the present invention.
In traditional power plant based on event guiding code (EOP), the cold nargin of the minimum mistake of reactor core and reactor pressure vessel water level measurement system are all design according to Experience Feedback after Three Mile Island accident.After Three Mile Island accident, in order to know the cold nargin of the minimum mistake of reactor core and SEA LEVEL VARIATION trend under emergency conditions, nuclear safety authorities of various countries require that new nuclear power factory must increase the means of directly the monitoring cold nargin of the minimum mistake of reactor core and water level, and demand fulfillment RG1.97Category1(1 level) parameter request.According to RG1.97 requirement, this Operation system setting A, B two series of redundancy, and complete independent operating between two series.But along with the ripe gradually of station guide code (SOP) and extensive application, the Core cooling status information that operator more and more relies on the cold nargin of the minimum mistake of reactor core and water level to provide carries out code judgement, this is more and more higher to the accuracy requirement of the cold nargin of the minimum mistake of reactor core and water level monitoring data, and redundancy series will be avoided to occur the situation that data are inconsistent, otherwise operator's code is chosen and brings obstacle, affect power plant safety.Therefore need badly and a kind of novel reactor core water level is provided and crosses the mutual calibration method of cold margin channel.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of requirement meeting station guide code, the accuracy of the cold nargin of the minimum mistake of further raising reactor core and water level monitoring data, and provide one group of unique cold nargin of the minimum mistake of reactor core and waterlevel data for the reactor core water level of operator when choosing code as much as possible and cross the mutual calibration method of cold margin channel.
For solving the problems of the technologies described above, a kind of reactor core water level of the present invention and the excessively mutual calibration method of cold margin channel, comprise the following steps successively:
The measurement data of step one, acquisition A, B series;
Following parameters is obtained by A measurement series:
-be in the normal main pump quantity N run at present rCP-A;
The minimum mistake of-reactor core cold nargin Δ T sAT-A;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-A; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-A;
-reactor pressure vessel water level L vSL-A;
-reactor pressure vessel water level the state of validity SL vSL-A;
Following parameters is obtained by B measurement series;
-be in the normal main pump quantity N run at present rCP-B;
The minimum mistake of-reactor core cold nargin Δ T sAT-B;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-B; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-B;
-reactor pressure vessel water level L vSL-B;
-reactor pressure vessel water level the state of validity SL vSL-B;
The above-mentioned data measured are sent to B series by point-to-point communication by A serial system, and the above-mentioned data measured are sent to A series by point-to-point communication by B series simultaneously;
According to standard JJF1059-1999, obtain the uncertainty Σ L of reactor pressure vessel level measuring passage vSL;
Step 2, mutually school entry condition judge;
1) for A serial system, judge that whether B series is normal to the copper of A series, if communications status is abnormal, then do not carry out data mutual school process, final this serial raw measurement data of display;
2) for B serial system, judge that whether A series is normal to the copper of B series, if communications status is abnormal, then do not carry out data mutual school process, final this serial raw measurement data of display;
3) if data communication is normal between two series, then N is judged rCP-Awhether with N rCP-Bequal; If unequal, A, B series does not all carry out the mutual school of data, final this serial raw measurement data of display; If equal, then carry out step 3;
Step 3, signal the state of validity statistics and primary Calculation;
1) obtain the number VT of the cold nargin useful signal of the minimum mistake of reactor core, obtain reactor pressure vessel water level useful signal number VL;
VT=SΔT SAT-A+SΔT SAT-B；
VL=SL VSL-A+SL VSL-B；
2) the minimum mistake of average reactor core cold nargin Δ T is obtained sAT-avgwith the minimum mistake of average reactor core cold nargin uncertainty Σ Δ T sAT-avg;
as S Δ T sAT-A=1, S Δ T sAT-Bwhen=0,
ΔT SAT-avg=ΔT SAT-A，ΣΔT SAT-avg=ΣΔT SAT-A；
as S Δ T sAT-A=0, S Δ T sAT-Bwhen=1,
ΔT SAT-avg=ΔT SAT-B，ΣΔT SAT-avg=ΣΔT SAT-B；
as S Δ T sAT-A=1, S Δ T sAT-B=1;
■ works as | Δ T sAT-A-Δ T sAT-B|≤Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
ΔT SAT-avg=(ΔT SAT-A+ΔT SAT-B)/2，
ΣΔT SAT-avg=(ΣΔT SAT-A+ΣΔT SAT-B)/2；
■ works as | Δ T sAT-A-Δ T sAT-B| > Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
◆ as Δ T sAT-A≤ Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-A, Σ Δ T sAT-avg=Σ Δ T sAT-A;
◆ as Δ T sAT-A> Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-B, Σ Δ T sAT-avg=Σ Δ T sAT-B;
3) mean water L is obtained vSL-avg;
work as SL vSL-A=1, SL vSL-Bwhen=0, L vSL-avg=L vSL-A;
work as SL vSL-A=0, SL vSL-Bwhen=1, L vSL-avg=L vSL-B;
work as SL vSL-A=1, SL vSL-Bwhen=1,
■ works as | L vSL-A-L vSL-B|≤2 × Σ L vSL; L vSL-avg=(L vSL-A+ L vSL-B)/2
■ works as | L vSL-A-L vSL-B| >2 × Σ L vSL; L vSL-avg=min (L vSL-A, L vSL-B)
work as SL vSL-A=0, SL vSL-Bwhen=0,
(1) when not having main pump to run;
If √ Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
If √ Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=64%;
If √-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=55%;
If √-200 DEG C≤Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=40%;
If √ Δ T sAT-avg<-200 DEG C, L vSL-F=0%;
(2) when a main pump at least will be had to run;
If √ Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
If √ Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=76%;
If √-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=60%;
If √ Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=0%;
Step 4: theoretical consistance judges;
According to the minimum mistake of the average reactor core cold nargin uncertainty Σ Δ T obtained in step 3 sAT-avgin " the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level " coordinate system, set up " physics can not region ", " physics can not region " be defined as follows:
(1) if having at least a main pump to run, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than bottom reactor core;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avg+ 24 and reactor pressure vessel water level lower than bottom reactor core;
(2) if all main pumps are all out of service, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than heat pipe section top;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avgand reactor pressure vessel water level is lower than reactor core top;
According to A, B row measurement data, form following four arrays: (Δ T sAT-A, L vSL-A), (Δ T sAT-A, L vSL-B), (Δ T sAT-B, L vSL-A), (Δ T sAT-B, L vSL-B); In these four arrays, if any one array contains invalid data component, then delete this array; Effective for residue array is put into " the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level " coordinate system, fallen into the number of combinations N in " the impossible region of physics " bad;
Step 5: data calculation and check, obtains the most believable unique one group of (Δ T sAT-V, L vSL-V);
work as VT=1, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=2, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=1, during VL=1, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
work as VT=2, during VL=1;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgwith Δ L vSL-avg, and
ΔT SAT-V=ΔT SAT-avg，L VSL-V=L VSL-avg；
If ■ is N bad=2, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=L vSL-avg;
work as VT=1, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the reactor pressure vessel water level of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2, Δ T sAT-V=Δ T sAT-avg, L vSL-V=min (L vSL-A, L vSL-B);
work as VT=2, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, it is invalid that the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " by falling into and reactor pressure vessel water level are forced to, and re-executes the calculating of step 3, upgrade Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2,
◆ if two arrays falling into " physics can not region " have identical reactor pressure vessel water level, then this reactor pressure vessel water level is forced to invalid, re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
◆ if two arrays falling into " physics can not region " do not have the cold nargin of the minimum mistake of identical reactor core, do not have identical reactor pressure vessel water level, then Δ T yet sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B);
If ■ is N bad=4, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B).
The present invention is by checking with intersecting of physics Probability Area based on the cold nargin of the minimum mistake of reactor core and reactor pressure vessel level measuring passage uncertainty and the combination of redundancy series data, A, B measurement series data are finally processed into unique one group of cold nargin of the minimum mistake of the most believable reactor core and pressure vessel waterlevel data, improve data reliability, simplify operator's interface quantity, avoid the situation that operator cannot process when running into A, B column data and being inconsistent simultaneously.Misdata and excessive data of drifting about can be rejected by the present invention in time, and provide unique one group of measurement data the most believable to operator, simplify operations staff's deterministic process, avoid the situation of operations staff's difficult treatment when redundancy measurement series data are inconsistent, improve security and the economy of power plant.
Embodiment
The present invention comprises the following steps successively:
The measurement data of step one, acquisition A, B series;
Following parameters is obtained by A measurement series:
-be in the normal main pump quantity N run at present rCP-A;
The minimum mistake of-reactor core cold nargin Δ T sAT-A;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-A; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-A;
-reactor pressure vessel water level L vSL-A;
-reactor pressure vessel water level the state of validity SL vSL-A;
Following parameters is obtained by B measurement series;
-be in the normal main pump quantity N run at present rCP-B;
The minimum mistake of-reactor core cold nargin Δ T sAT-B;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-B; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-B;
-reactor pressure vessel water level L vSL-B;
-reactor pressure vessel water level the state of validity SL vSL-B;
The above-mentioned data measured are sent to B series by point-to-point communication by A serial system, and the above-mentioned data measured are sent to A series by point-to-point communication by B series simultaneously;
Communication between A, B series meets electrical isolation criterion;
According to standard JJF1059-1999, obtain the uncertainty Σ L of reactor pressure vessel level measuring passage vSL;
Step 2, mutually school entry condition judge;
1) for A serial system, judge that whether B series is normal to the copper of A series, if communications status is abnormal, then do not carry out data mutual school process, what finally send master-control room to show is this serial raw measurement data (behind non-mutual school data), and points out operator;
2) for B serial system, judge that whether A series is normal to the copper of B series, if communications status is abnormal, then do not carry out data mutual school process, what finally send master-control room to show is this serial raw measurement data (behind non-mutual school data), and points out operator;
3) if data communication is normal between two series, then N is judged rCP-Awhether with N rCP-Bequal; If unequal, A, B series does not all carry out the mutual school of data, shows this serial raw measurement data (behind non-mutual school data) respectively, and points out operator; If equal, then carry out step 3;
Step 3, signal the state of validity statistics and primary Calculation;
1) obtain the number VT of the cold nargin useful signal of the minimum mistake of reactor core, obtain reactor pressure vessel water level useful signal number VL;
VT=SΔT SAT-A+SΔT SAT-B；
VL=SL VSL-A+SL VSL-B；
2) the minimum mistake of average reactor core cold nargin Δ T is obtained sAT-avgwith the minimum mistake of average reactor core cold nargin uncertainty Σ Δ T sAT-avg;
as S Δ T sAT-A=1, S Δ T sAT-Bwhen=0, Δ T sAT-avg=Δ T sAT-A, Σ Δ T sAT-avg=Σ Δ T sAT-A;
as S Δ T sAT-A=0, S Δ T sAT-Bwhen=1, Δ T sAT-avg=Δ T sAT-B, Σ Δ T sAT-avg=Σ Δ T sAT-B;
as S Δ T sAT-A=1, S Δ T sAT-B=1;
■ works as | Δ T sAT-A-Δ T sAT-B|≤Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
ΔT SAT-avg=(ΔT SAT-A+ΔT SAT-B)/2，
ΣΔT SAT-avg=(ΣΔT SAT-A+ΣΔT SAT-B)/2；
■ works as | Δ T sAT-A-Δ T sAT-B| > Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
◆ as Δ T sAT-A≤ Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-A, Σ Δ T sAT-avg=Σ Δ T sAT-A;
◆ as Δ T sAT-A> Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-B, Σ Δ T sAT-avg=Σ Δ T sAT-B;
Note: do not consider S Δ T sAT-As Δ T while of=0 sAT-Bthe situation of=0;
3) mean water L is obtained vSL-avg;
work as SL vSL-A=1, SL vSL-Bwhen=0, L vSL-avg=L vSL-A;
work as SL vSL-A=0, SL vSL-Bwhen=1, L vSL-avg=L vSL-B;
work as SL vSL-A=1, SL vSL-Bwhen=1,
■ works as | L vSL-A-L vSL-B|≤2 × Σ L vSL; L vSL-avg=(L vSL-A+ L vSL-B)/2
■ works as | L vSL-A-L vSL-B| >2 × Σ L vSL; L vSL-avg=min (L vSL-A, L vSL-B)
work as SL vSL-A=0, SL vSL-Bwhen=0,
L vSL-Aand L vSL-Ball invalid, then need according to Δ T sAT-avgcalculate default value water level L vSL-F;
(1) when not having main pump to run;
If √ Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
If √ Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=64%;
If √-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=55%;
If √-200 DEG C≤Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=40%;
If √ Δ T sAT-avg<-200 DEG C, L vSL-F=0%;
(2) when a main pump at least will be had to run;
If √ Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
If √ Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=76%;
If √-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=60%;
If √ Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=0%;
Step 4: theoretical consistance judges;
According to the minimum mistake of the average reactor core cold nargin uncertainty Σ Δ T obtained in step 3 sAT-avgin " the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level " coordinate system, set up " physics can not region ", " physics can not region " be defined as follows:
(1) if having at least a main pump to run, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than bottom reactor core;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avg+ 24 and reactor pressure vessel water level lower than bottom reactor core;
(2) if all main pumps are all out of service, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than heat pipe section top;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avgand reactor pressure vessel water level is lower than reactor core top;
According to A, B row measurement data, form following four arrays: (Δ T sAT-A, L vSL-A), (Δ T sAT-A, L vSL-B), (Δ T sAT-B, L vSL-A), (Δ T sAT-B, L vSL-B); In these four arrays, if any one array contains invalid data component, then delete this array; Such as, if the water level L that arrives of B measurement series vSL-Binvalid, i.e. SL vSL-B=0, then (Δ T sAT-A, L vSL-B) and (Δ T sAT-B, L vSL-B) these two arrays are just invalid, should be deleted; Effective for residue array is put into the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level coordinate system, is fallen into the number of combinations N in " the impossible region of physics " bad;
Step 5: data calculation and check, obtains the most believable unique one group of (Δ T sAT-V, L vSL-V);
work as VT=1, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=2, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=1, during VL=1, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
work as VT=2, during VL=1;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgwith Δ L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=L vSL-avg;
work as VT=1, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the reactor pressure vessel water level of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2, Δ T sAT-V=Δ T sAT-avg, L vSL-V=min (L vSL-A, L vSL-B);
work as VT=2, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, it is invalid that the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " by falling into and reactor pressure vessel water level are forced to, and re-executes the calculating of step 3, upgrade Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2
◆ if two arrays falling into " physics can not region " have identical reactor pressure vessel water level, then this reactor pressure vessel water level is forced to invalid, re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
◆ if two arrays falling into " physics can not region " do not have the cold nargin of the minimum mistake of identical reactor core, do not have identical reactor pressure vessel water level, then Δ T yet sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B);
If ■ is N bad=4, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B);
Note: N badcan not 3 be equaled.

Claims (1)

1. reactor core water level and the excessively mutual calibration method of cold margin channel, comprise the following steps successively:
The measurement data of step one, acquisition A, B series;
Following parameters is obtained by A measurement series:
-be in the normal main pump quantity N run at present rCP-A;
The minimum mistake of-reactor core cold nargin Δ T sAT-A;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-A; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-A;
-reactor pressure vessel water level L vSL-A;
-reactor pressure vessel water level the state of validity SL vSL-A;
Following parameters is obtained by B measurement series;
-be in the normal main pump quantity N run at present rCP-B;
The minimum mistake of-reactor core cold nargin Δ T sAT-B;
The minimum mistake of-reactor core cold nargin the state of validity S Δ T sAT-B; 1 represents effectively, and 0 represents invalid;
The minimum mistake of-reactor core cold nargin uncertainty Σ Δ T sAT-B;
-reactor pressure vessel water level L vSL-B;
-reactor pressure vessel water level the state of validity SL vSL-B;
The above-mentioned data measured are sent to B series by point-to-point communication by A serial system, and the above-mentioned data measured are sent to A series by point-to-point communication by B series simultaneously;
According to standard JJF1059-1999, obtain the uncertainty Σ L of reactor pressure vessel level measuring passage vSL;
Step 2, signal the state of validity statistics and primary Calculation;
1) obtain the number VT of the cold nargin useful signal of the minimum mistake of reactor core, obtain reactor pressure vessel water level useful signal number VL;
VT＝SΔT SAT-A+SΔT SAT-B；
VL＝SL VSL-A+SL VSL-B；
2) the minimum mistake of average reactor core cold nargin Δ T is obtained sAT-avgwith the minimum mistake of average reactor core cold nargin uncertainty Σ Δ T sAT-avg;
as S Δ T sAT-A=1, S Δ T sAT-Bwhen=0,
ΔT SAT-avg＝ΔT SAT-A，ΣΔT SAT-avg＝ΣΔT SAT-A；
as S Δ T sAT-A=0, S Δ T sAT-Bwhen=1,
ΔT SAT-avg＝ΔT SAT-B，ΣΔT SAT-avg＝ΣΔT SAT-B；
as S Δ T sAT-A=1, S Δ T sAT-B=1;
■ works as | Δ T sAT-A-Δ T sAT-B|≤Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
ΔT SAT-avg＝(ΔT SAT-A+ΔT SAT-B)/2，
ΣΔT SAT-avg＝(ΣΔT SAT-A+ΣΔT SAT-B)/2；
■ works as | Δ T sAT-A-Δ T sAT-B| > Σ Δ T sAT-A+ Σ Δ T sAT-Btime,
◆ as Δ T sAT-A≤ Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-A, Σ Δ T sAT-avg=Σ Δ T sAT-A;
◆ as Δ T sAT-A> Δ T sAT-Btime, Δ T sAT-avg=Δ T sAT-B, Σ Δ T sAT-avg=Σ Δ T sAT-B;
3) mean water L is obtained vSL-avg;
work as SL vSL-A=1, SL vSL-Bwhen=0, L vSL-avg=L vSL-A;
work as SL vSL-A=0, SL vSL-Bwhen=1, L vSL-avg=L vSL-B;
work as SL vSL-A=1, SL vSL-Bwhen=1,
■ works as | L vSL-A-L vSL-B|≤2 × Σ L vSL; L vSL-avg=(L vSL-A+ L vSL-B)/2
■ works as | L vSL-A-L vSL-B| >2 × Σ L vSL; L vSL-avg=min (L vSL-A, L vSL-B)
work as SL vSL-A=0, SL vSL-Bwhen=0,
(1) when not having main pump to run;
if Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
if Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=64%;
if-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=55%;
if-200 DEG C≤Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=40%;
if Δ T sAT-avg<-200 DEG C, L vSL-F=0%;
(2) when a main pump at least will be had to run;
if Δ T sAT-avg>=Σ Δ T sAT-avg+ 24, L vSL-F=100%;
if Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg+ 24, L vSL-F=76%;
if-Σ Δ T sAT-avg≤ Δ T sAT-avg< Σ Δ T sAT-avg, L vSL-F=60%;
if Δ T sAT-avg<-Σ Δ T sAT-avg, L vSL-F=0%;
Step 3: data calculation and check, obtains the most believable unique one group of (Δ T sAT-V, L vSL-V);
work as VT=1, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=2, during VL=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-F;
work as VT=1, during VL=1, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
work as VT=2, during VL=1;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgwith Δ L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=L vSL-avg;
work as VT=1, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, the reactor pressure vessel water level of the combination of " physics can not region " is forced to invalid by falling into, and re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2, Δ T sAT-V=Δ T sAT-avg, L vSL-V=min (L vSL-A, L vSL-B);
work as VT=2, during VL=2;
If ■ is N bad=0, Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=1, it is invalid that the cold nargin of the minimum mistake of reactor core of the combination of " physics can not region " by falling into and reactor pressure vessel water level are forced to, and re-executes the calculating of step 3, upgrade Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
If ■ is N bad=2,
◆ if two arrays falling into " physics can not region " have identical reactor pressure vessel water level, then this reactor pressure vessel water level is forced to invalid, re-executes the calculating of step 3, upgrades Δ T sAT-avgand L vSL-avg, and Δ T sAT-V=Δ T sAT-avg, L vSL-V=L vSL-avg;
◆ if two arrays falling into " physics can not region " do not have the cold nargin of the minimum mistake of identical reactor core, do not have identical reactor pressure vessel water level, then Δ T yet sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B);
If ■ is N bad=4, Δ T sAT-V=min (Δ T sAT-A, Δ T sAT-A), L vSL-V=min (L vSL-A, L vSL-B);
It is characterized in that: further comprising the steps of between described step one and step 2:
Mutual school entry condition judges;
1) for A serial system, judge that whether B series is normal to the copper of A series, if communications status is abnormal, then do not carry out data mutual school process, final this serial raw measurement data of display;
2) for B serial system, judge that whether A series is normal to the copper of B series, if communications status is abnormal, then do not carry out data mutual school process, final this serial raw measurement data of display;
3) if data communication is normal between two series, then N is judged rCP-Awhether with N rCP-Bequal; If unequal, A, B series does not all carry out the mutual school of data, final this serial raw measurement data of display; If equal, then carry out step 2;
Further comprising the steps of between described step 2 and step 3:
Theoretical consistance judges;
According to the minimum mistake of the average reactor core cold nargin uncertainty Σ Δ T obtained in step 2 sAT-avgin " the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level " coordinate system, set up " physics can not region ", " physics can not region " be defined as follows:
(1) if having at least a main pump to run, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than bottom reactor core;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avg+ 24 and reactor pressure vessel water level lower than bottom reactor core;
(2) if all main pumps are all out of service, physics can not be defined as in region:
the cold nargin of the minimum mistake of reactor core is less than-Σ Δ T sAT-avgand reactor pressure vessel water level is higher than heat pipe section top;
the cold nargin of the minimum mistake of reactor core is greater than Σ Δ T sAT-avgand reactor pressure vessel water level is lower than reactor core top;
According to A, B row measurement data, form following four arrays: (Δ T sAT-A, L vSL-A), (Δ T sAT-A, L vSL-B), (Δ T sAT-B, L vSL-A), (Δ T sAT-B, L vSL-B); In these four arrays, if any one array contains invalid data component, then delete this array; Effective for residue array is put into " the cold nargin of the minimum mistake of reactor core-reactor pressure vessel water level " coordinate system, fallen into the number of combinations N in " the impossible region of physics " bad.
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